diff --git a/src/switch_rtp.c b/src/switch_rtp.c
index c34da28c58..9211ec2cee 100644
--- a/src/switch_rtp.c
+++ b/src/switch_rtp.c
@@ -688,7 +688,7 @@ static int zrtp_send_rtp_callback(const zrtp_stream_t *stream, char *rtp_packet,
 	return status;
 }
 
-static void zrtp_event_callback(zrtp_stream_t *stream, unsigned event)
+static void zrtp_event_callback(zrtp_stream_t *stream, zrtp_security_event_t event)
 {
 	switch_rtp_t *rtp_session = zrtp_stream_get_userdata(stream);
 	zrtp_session_info_t zrtp_session_info;